Remove cabal conditionals for GHC versions <9.2

Author: aniketd

eras/alonzo/impl/cardano-ledger-alonzo.cabal

@@ -103,9 +103,6 @@ library
     transformers,
     validation-selective,
 
-  if !impl(ghc >=9.2)
-    ghc-options: -Wno-name-shadowing
-
 library testlib
   exposed-modules:
     Test.Cardano.Ledger.Alonzo.Arbitrary

libs/cardano-ledger-conformance/cardano-ledger-conformance.cabal

@@ -97,9 +97,6 @@ library
     unliftio,
     vector-map,
 
-  if !impl(ghc >=9.2)
-    ghc-options: -Wno-incomplete-patterns
-
   if flag(asserts)
     ghc-options: -fno-ignore-asserts
 

libs/cardano-ledger-core/cardano-ledger-core.cabal

@@ -145,9 +145,6 @@ library
   if flag(asserts)
     ghc-options: -fno-ignore-asserts
 
-  if !impl(ghc >=9.2)
-    ghc-options: -Wno-name-shadowing
-
 library testlib
   exposed-modules:
     Test.Cardano.Ledger.Common
@@ -222,9 +219,6 @@ library testlib
     unliftio,
     vector-map:{vector-map, testlib},
 
-  if !impl(ghc >=9.2)
-    ghc-options: -Wno-name-shadowing
-
 executable plutus-debug
   main-is: PlutusDebug.hs
   hs-source-dirs: app